// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_H_
#define UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_H_

#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/message_center/message_center_export.h"
#include "ui/message_center/notification.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/controls/slide_out_view.h"

namespace ui {
class MenuModel;
}

namespace views {
class ImageButton;
class ImageView;
class Painter;
class ScrollView;
}

namespace message_center {

// Interface that MessageView uses to report clicks and other user actions.
// Provided by creator of MessageView.
class MessageViewController {
public:
    virtual void ClickOnNotification(const std::string& notification_id) = 0;
    virtual void RemoveNotification(const std::string& notification_id,
        bool by_user)
        = 0;
};

// Individual notifications constants.
const int kPaddingBetweenItems = 10;
const int kPaddingHorizontal = 18;
const int kWebNotificationButtonWidth = 32;
const int kWebNotificationIconSize = 40;

// An base class for a notification entry. Contains background, close button
// and other elements shared by derived notification views.
class MESSAGE_CENTER_EXPORT MessageView : public views::SlideOutView,
                                          public views::ButtonListener {
public:
    MessageView(MessageViewController* controller,
        const std::string& notification_id,
        const NotifierId& notifier_id,
        const gfx::ImageSkia& small_image,
        const base::string16& display_source);
    ~MessageView() override;

    // Updates this view with the new data contained in the notification.
    virtual void UpdateWithNotification(const Notification& notification);

    // Returns the insets for the shadow it will have for rich notification.
    static gfx::Insets GetShadowInsets();

    // Creates a shadow around the notification.
    void CreateShadowBorder();

    bool IsCloseButtonFocused();
    void RequestFocusOnCloseButton();

    void set_accessible_name(const base::string16& accessible_name)
    {
        accessible_name_ = accessible_name;
    }

    // Overridden from views::View:
    void GetAccessibleState(ui::AXViewState* state) override;
    bool OnMousePressed(const ui::MouseEvent& event) override;
    bool OnKeyPressed(const ui::KeyEvent& event) override;
    bool OnKeyReleased(const ui::KeyEvent& event) override;
    void OnPaint(gfx::Canvas* canvas) override;
    void OnFocus() override;
    void OnBlur() override;
    void Layout() override;

    // Overridden from ui::EventHandler:
    void OnGestureEvent(ui::GestureEvent* event) override;

    // Overridden from ButtonListener:
    void ButtonPressed(views::Button* sender, const ui::Event& event) override;

    void set_scroller(views::ScrollView* scroller) { scroller_ = scroller; }
    std::string notification_id() { return notification_id_; }
    NotifierId notifier_id() { return notifier_id_; }
    const base::string16& display_source() const { return display_source_; }

protected:
    // Overridden from views::SlideOutView:
    void OnSlideOut() override;

    views::ImageView* small_image() { return small_image_view_.get(); }
    views::ImageButton* close_button() { return close_button_.get(); }
    views::ScrollView* scroller() { return scroller_; }

private:
    MessageViewController* controller_;
    std::string notification_id_;
    NotifierId notifier_id_;
    views::View* background_view_; // Owned by views hierarchy.
    scoped_ptr<views::ImageButton> close_button_;
    scoped_ptr<views::ImageView> small_image_view_;
    views::ScrollView* scroller_;

    base::string16 accessible_name_;

    base::string16 display_source_;

    scoped_ptr<views::Painter> focus_painter_;

    // Changes the background color being used by |background_view_| and schedules
    // a paint.
    void SetDrawBackgroundAsActive(bool active);

    DISALLOW_COPY_AND_ASSIGN(MessageView);
};

} // namespace message_center

#endif // UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_H_
